[gtksourceview] completionlist: use 1 for target position width

[Christian Hergert <chergert src gnome org>]

commit c68091e2aeda6071742c4ec87908d09cf6193147
Author: Christian Hergert <chergert redhat com>
Date:   Fri Sep 2 14:43:39 2022 -0700

    completionlist: use 1 for target position width
    
    Using 0 was not really useful because it meant we could never compare the
    rectangle with a previous value. gtk_popover_get_pointing_to() will always
    return 1 for a width if it was set using a zero-width rect.
    
    Using 1 means we have a stable value that can be compared across a setter
    and getter for the GtkPopover.

 gtksourceview/gtksourcecompletionlist.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/gtksourceview/gtksourcecompletionlist.c b/gtksourceview/gtksourcecompletionlist.c
index c97a9bdd..3532b1b0 100644
--- a/gtksourceview/gtksourcecompletionlist.c
+++ b/gtksourceview/gtksourcecompletionlist.c
@@ -348,10 +348,13 @@ _gtk_source_completion_list_get_target_location (GtkSourceAssistant *assistant,
 
        GTK_SOURCE_ASSISTANT_CLASS (_gtk_source_completion_list_parent_class)->get_target_location 
(assistant, rect);
 
-       /* We want to align to the beginning of the character, so set the width
-        * to 0 to ensure things align correctly.
+       /* We want to align to the beginning of the character, so set the
+        * width to one to ensure that. We do not use zero here just to help
+        * ensure math is stable but also because GtkPopover's
+        * gtk_popover_set_pointing_to() would convert width to one anyway.
+        * That way the value can be compared for changes.
         */
-       rect->width = 0;
+       rect->width = 1;
 }
 
 static GtkSizeRequestMode